One of the thrills of life in the Air Force has been traveling the world and taking advantage of learning about all the places I've been; especially their military history. I'm currently in northern Virginia and have a fixation on the Civil War, so battlefields are an easy weekend-filler.
One of my most treasured historical battlefield experiences was catching a ride on a KC-135 from Kadena Air Base to spend the day at Iwo Jima. The island is somewhat frozen in time, as it only maintains a small presence of Japanese Self Defense Force personnel on one airfield. Therefore, as you make your way around, there are still numerous WWII artifacts right where they were during that terrible battle.
Hiking up from the waterline gives you a surreal sense of how hellish it was for the Marines to land on the island. Your boots sink into the sand and reaching every crest in front of you just reveals another terraced ascent ahead. The Japanese had emplacements, pillboxes, and hidden positions everywhere. On one hand, the battle is made tangible and sobering when you walk the ground, on the other, it is beautifully serene with no one there.
From the beach:
From the top of Mount Suribachi:
Mandatory "Gig 'Em"
A naval gun that General Kuribayashi had positioned as an artillery piece on the north side of Suribachi:
Machine gun in a pillbox:
One of the tunnels - these were super tight, roach filled, and DARK. There is still IJA materiel throughout the tunnels, which you are directed not to touch (or pilfer, of course). Also, unlike most caves I've been it, it is warm to hot in the tunnels (understandably, since it is a volcano).